Call your cell phone carrier and ask for a line block permanently suppress your phone number in outbound Caller ID.This change is permanent and irreversible. While customer service may attempt to convince you to reconsider, the choice is yours. How to Block Your Number on the iPhone By Techwalla Contributor Updated February 9, 2017 There is an option on the iPhone to be able to easily turn off the caller ID and for your number to show up only as a Blocked number when making calls. Learn from T-Mobile, how to block your number from any phone! Close video. How do I block my number? Want to keep your number from showing up on someone’s Caller ID? Here’s how. Play video. Blocking your number for the duration of a call. Follow these simple steps to block your number. How To Block Your Number When Calling Someone on iPhone - Duration: 4:33. Helpful Tutorials 6,649 views. 4:33. 10 Secret Phone Features You’ll Start Using Right Away - Duration: 10:52. How to Block Your Number from Caller ID By Techwalla Contributor Updated February 9, 2017 This feature gives consumers the ability to screen calls and avoid unwelcome calls from bill collectors or others. If you want to block your cell phone number from showing up on other phones (for whatever reason), you can do it temporarily simply by dialing *67 before the number you're calling. Thanks to the *67 vertical service code, you can prevent your number from appearing on a recipient's phone or caller ID device when you place a call. On either your traditional landline or mobile smartphone, dial *67 followed by the number you want to call.When using *67, the person you're calling sees a message such as blocked or private number when their phone rings. How To: Block your number from caller ID How To: Block a cell phone number How To: Block your cell phone number How To: How Credit Card Algorithms Work: The Anatomy of Credit Card Numbers News: New Minecraft Map Format, Anvil Announced Everyone has caller ID these days, but sometimes you want to block your phone number when you make a call. Fortunately, blocking your phone number is pretty easy to do - simply follow these steps.